Ultraviolet curing paint and preparation method and application thereof
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A technology for curing coatings and ultraviolet light, applied in the direction of polyester coatings, polyether coatings, epoxy resin coatings, etc. Incompatibility, light transmittance drop and other problems, to achieve the effect of high hardness, high wear resistance, good thermal stability
Active Publication Date: 2011-05-25
GUANGZHOU HUMAN CHEM
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Compared with coatings cured by traditional processes, UV-cured coatings show better overall performance, but for some precision instruments and high scratch resistance required by optical devices, the hardness, wear resistance, and scratch resistance of coatings Sex still needs to be improved
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Embodiment 1
[0033] 100g SiO 2 Put the sol (30% solid content, pH=3) into a four-necked flask and stir at a constant speed, heat to 50°C, slowly add 20g of γ-methacryloxypropyltrimethoxysilane dropwise, keep warm for 5hr after the dropwise addition, and cool down to 20°C to obtain modified SiO 2 Sol.
[0034] Take 50g modified SiO 2 Sol, add 15g of water-soluble polyurethane acrylate, 25g of deionized water, 8g of ethylene glycol butyl ether, 0.1g of leveling agent BYK333 (produced by Germany BYK) under stirring, mix for 10min, then add 2g of 2-hydroxy-2 -Methyl-1-phenyl-1-propanone, stirred for 5 minutes to obtain a UV-curable coating.
Embodiment 2
[0036] 100g SiO 2 Put the sol (solid content 30%, pH=2) into a four-neck flask and stir at a constant speed, heat to 60°C, slowly add 20g of vinyltrimethoxysilane dropwise, keep warm for 3hr after the dropwise addition, and cool down to 24°C to obtain modified SiO 2 Sol.
[0037] Take 80g modified SiO 2 Sol, add 10g water-soluble epoxy acrylate, 5g absolute ethanol, 2g propylene glycol methyl ether, 0.1g leveling agent BYK333 (produced by German BYK company) under stirring, mix for 10min, then add 2g 1-hydroxyl-cyclohexyl Benzophenone was stirred for 5 minutes to obtain a UV-curable coating.
Embodiment 3
[0039] 120g SiO 2Put the sol (solid content 25%, pH=4) into a four-necked flask and stir at a constant speed, heat it to 40°C, slowly add 10g of vinyltriethoxysilane dropwise, keep it warm for 6hrs after the dropwise addition, and cool down to 26°C to obtain modification SiO 2 Sol.
[0040] Take 50g modified SiO 2 Sol, add 15g of water-soluble polyether acrylate, 25g of methanol, 8g of isopropanol, 0.1g of leveling agent BYK333 (produced by German BYK company) under stirring, mix for 10min, then add 2g of 2,4,6-trimethyl Benzoyl diphenylphosphorus oxide was stirred for 5 minutes to obtain a UV-curable coating.
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Abstract
The invention discloses an ultraviolet (UV) curing paint and a preparation method and application thereof. The preparation method comprises the following steps: weighting modified SiO2 sol to place in a container, adding water-soluble UV-cured resin, solvent and additive in turn, stirring for 10min, then adding photoinitiator, and stirring for 5min to obtain the UV curing paint, wherein the contents of the water-soluble UV-cured resin, the solvent, the additive and the photoinitiator are 10-60%, 7-33%, 0.1% and 2% respectively. The UV curing paint prepared by the method of the invention has the advantages of inorganic materials such as high hardness, high wear resistance, scratch resistance and good thermal stability and also has the advantages of organic materials such as adhesivity and relative flexibility; and the UV curing paint is suitable to be used as the protective coatings on the surfaces of all kinds of optical plastic products such as polyester which contains polycarbonate, polymethylmethacrylate, polyethylene terephthalate (PET) and the like. By adopting the UV curing paint of the invention, the defects of the existing UV curing paint in the aspects of hardness, wear resistance, scratch resistance and light transmittance, can be overcomed to a certain extent.
Description
technical field [0001] The invention relates to the field of ultraviolet curing coatings, in particular to a transparent, wear-resistant and hardening ultraviolet curing coating, a preparation method and application thereof. Background technique [0002] Due to the advantages of low density, good impact resistance, and easy processing and molding, optical plastics are often used to make transparent windows. For example, vehicles, electronic products, buildings, glasses, and other optical instruments can use crack-resistant transparent plastics. [0003] The main advantages of transparent plastic are crack resistance, light weight and design flexibility, but its serious disadvantages are poor friction resistance, easy to reduce visibility and poor appearance due to scratches and scratches, which limit its scope of use. [0004] It is a simple and practical method to improve the surface hardness and wear resistance of transparent plastics through surface enhancement, which can...
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